There is currently only the one seating configuration being used for the DFW flights and you indeed have PE seats (but economy service).

The 14 First seats in the nose are being used for business, 14 skybeds in rows 29/30 are being used for PE and PE seating in rows 36-39 are being used for economy.

http://www.qantas.com.au/infodetail/...66J40W187Y.pdf